The ceramic foam filter molten metal filtration can improve the mechanical properties of castings, reduce the rejection rate of castings, reduce tool wear during casting processing, etc. so that high-quality precision castings can be produced, and the economic and social benefits are significantly increased.inquiry
1. The honeycomb structure ceramic foam filter molten metal filtration can absorb particles, filter out the inclusions in the casting, and escape the bubbles contained in the molten metal, which is obviously superior to the high-silica gauze filter and straight-hole filter products. The former is for screening and adsorption of tiny slag inclusions, while the latter two are for screening only.
2. Let the molten metal change from eddy current to stable and constant flow, and stabilize the purified molten metal.
3. Simplify the design requirements of the casting system and reduce the length of the runner.
From the fields of filtration and thermal engineering, it has gradually expanded to the fields of heat insulation, sound absorption, electronics, optoelectronics, sensing, environmental biology, and chemistry.
1. Choice of aperture:
Ductile iron filtration: general pore size is 10~15PPI
Grey Iron/Copper Filtration: Typical pore size is 10, 15, or 20 PPI
2. Filtration requirements:
The filtration volume per unit area of the filter generally does not exceed: gray iron: 4kg/cm2, ductile iron: 2kg/cm2
3. Filter area requirements:
In order to prevent the molten metal from directly impacting the filter, the cross-section of the runner where the filter is placed should be appropriately enlarged, generally 2 to 4 times that of the normal runner cross-section.
For example, when directly impacting the filter, the pouring height should preferably not exceed 300mm.
The foam ceramic filter can be placed in various parts of the gating system, as close as possible to the inner gate, so as to maximize the filtering and purification effect; due to the blocking effect of the filter and the gradual blockage of some air holes, the filter is required to be cut off. The area is larger than the normal runner section, generally 2 to 4 times the normal runner section.